JP2004155971A - High-calorie gas-recovering apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To produce a high-calorie gas from local unused resources and use the gas as a fuel for electric power generation. <P>SOLUTION: The high-calorie gas-recovering apparatus for producing and recovering the high-calorie gas by treating the local unused resources (a) is equipped with a carbonizing furnace 2 for carbonizing the local unused resources (a) and a gasifying and melting furnace 1 for generating calorie for carrying out carbonization treatment of the local unused resources (a) in the carbonizing furnace 2. In the apparatus, the gasifying and melting furnace 1 is connected to the carbonizing furnace 2 and the gas produced in the gasifying and melting furnace 1 is led to the carbonizing furnace 2 and a prescribed combustible material in the carbonizing furnace 2 is carbonized by the produced gas sensible heat and the gas produced in the gasifying and melting furnace 1 and the carbonizing furnace 2 is utilized for power generation by burning the gas. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a high-calorie gas recovery device, and more particularly to a high-calorie gas recovery device that recovers high-calorie gas from waste or unused resources in each region, and generates, stores, and supplies power using the gas.
[0002]
[Prior art]
A method of incinerating or melting waste and generating electricity from a boiler or the like using the heat source has been practiced as a conventional technique. However, incineration in stoker furnaces produces low gas sensible heat, and small furnaces are mainly equipped with hot water supply facilities.In large furnaces, power generation is possible, but power generation efficiency is low and equipment for increasing efficiency is required. It is. In addition, stoker furnaces have problems in the disposal of ash, cans and bottles after incineration. Gasification and melting furnaces have a track record of steam power generation, but have the drawback of increasing operating costs because a large amount of fuel such as coke is consumed to melt ash or metals in waste. Further, in the exhaust gas treatment, in order to remove harmful substances in the exhaust gas, it has a heavy structure in which facilities such as a catalytic denitration facility, a bag filter, a wet smoke washing facility, and an activated carbon adsorption tower are combined. As the above technique, for example, there is a technique as disclosed in Patent Document 1.
[0003]
[Patent Document 1]
JP-A-11-190511
[0004]
[Problems to be solved by the invention]
As described above, in the general waste treatment, the conventional incineration method of a stoker furnace or the like has low power generation efficiency, and furthermore, costs are added to the disposal of incineration residues. The gasification and melting furnace has a drawback that the operation cost is high because a fuel such as coke is used.
[0005]
Furthermore, it is inevitable that the exhaust gas treatment equipment will have a heavy structure in order to remove harmful substances. The present invention connects the gasification and melting furnace and the carbonization furnace to improve the shortcomings of the stoker furnace and the gasification and melting furnace, and generates high-calorie gas from unused resources such as waste and thinned wood in each region to generate electricity. , Storage and power supply systems.
[0006]
[Means for Solving the Problems]
The present invention has been made in view of the above-mentioned problems, and the invention according to claim 1 is to treat a combustible material such as a locally unused resource or a waste to generate a high calorie gas, In a high calorie gas recovery device for recovering gas, a carbonization furnace for carbonizing the combustible material to generate a carbide, and a gasification and melting furnace for generating a gas, wherein the gasification and melting furnace and the carbonization furnace are connected. The generated gas generated in the gasification and melting furnace is guided to the carbonization furnace, and at that time, a predetermined combustible substance in the carbonization furnace is carbonized by the gas sensible heat of the generated gas, and the gasification and melting furnace and the carbonization It is a high calorie gas recovery device that recovers gas generated by the furnace.
[0007]
The invention according to claim 2 is characterized in that the carbonization furnace carbonizes wood and the like in the carbonization furnace to generate a carbide and collects unnecessary substances in a generated gas led from the gasification and melting furnace by the carbide. It is a calorie gas recovery device.
[0008]
The invention according to claim 3 is characterized in that the carbide recovered from the carbonization furnace is crushed, the crushed carbide is formed into a special pellet or pricket having a double structure, and power is generated by the generated gas. A high-calorie gas recovery apparatus for drying and solidifying the pellets or pleckets with waste heat of the combustion gas used in the step (a) to make the calorific value of the gasification and melting furnace.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 shows a schematic configuration of a high calorie gas recovery device. The high calorie recovery device includes a gasification melting furnace 1 and a carbonization furnace 2. The temperature of the generated gas discharged from the gasification and melting furnace 1 is usually 400 to 800 ° C. (a range that can be set by operation) and is a reducing gas. This gas is connected to the lower part of the carbonization furnace 2. The carbonization furnace 2 is a moving bed system, in which locally unused resources (for example, thinned materials) a are charged from the upper part. For example, while the thinned materials move to the lower part of the carbonization furnace 2, the gas generated from the gasification and melting furnace 1 from the lower part of the furnace. Carbonized. The temperature suitable for carbonization at this time is 400 to 800 ° C.
[0011]
At this time, since the carbonized carbonized carbon C has the same function as the activated carbon, the carbonized carbon also serves as a dust collecting facility for adsorbing harmful substances contained in the gas generated in the gasification and melting furnace 1. In addition, the thinned wood generates a reducing gas such as carbon monoxide and hydrogen by a thermal decomposition action in the carbonization process, and becomes a calorific gas by adding to the generated gas of the gasification and melting furnace 1. On the other hand, the carbide that has adsorbed harmful substances is pulverized and formed into pellets or prequettes to replace fuel such as coke, so that a reduction in operating costs can be guaranteed and energy such as electric power can be recovered. it can.
[0012]
FIG. 2 is a system flow of the present invention. The gasification and melting furnace 1 discharges waste and slag and metal of a locally unused resource (for example, an iomas resource) a from the lower part of the furnace. From the upper part of the furnace, gas generated from fuel, waste and biomass resources is discharged. The components of the product gas are reducing gases such as carbon monoxide, hydrogen, methane and ethylene, and the balance is nitrogen and water vapor. However, it contains trace amounts of chlorine-based gas and heavy metals. The temperature of this gas is usually 400-800 ° C. and is oxygen-free.
[0013]
In the carbonization furnace 2, locally unused resources “a” such as thinned wood from each region are charged from the upper part of the furnace. The generated gas of the gasification and melting furnace 1 is introduced from the lower part of the furnace and carbonized. The carbonization furnace 2 is a moving bed type. As the thinned wood descends from the upper part, moisture evaporates and diffuses from the inside of the thinned wood to the surface.
[0014]
As the temperature approaches a lower part of the carbonization furnace 2, the temperature becomes higher, and volatile carbon and hydrogen are gasified to generate carbon monoxide and hydrogen. Thinned wood creates numerous pores inside by evaporation, diffusion and gasification of water. These pores are composed of large macropores and small mesopores, and are less than 100 angstroms. Dioxin D has a size of about 15 angstroms and is adsorbed in pores. Gaseous heavy metals are similarly adsorbed. The carbide C adsorbing these is discharged at the lower part of the carbonization furnace 2. The gas after the carbonization is added to the gas generated in the gasification and melting furnace 1 and the carbonization furnace 2 and becomes a high calorie.
[0015]
The back filter 3 collects fly ash and soot-like fine powder on the surface of the carbide C by moving in the carbonization furnace 2. The collected fly ash and the like are formed together with the carbide C in the pulverizing and granulating step. A high calorie gas in the gasification melting furnace 1 and the carbonization furnace 2 is burned by a gas fuel internal combustion engine (for example, a gas turbine, an engine, etc.) 4.
[0016]
Next, the collected fuel of the bag filter 3 and the solid fuel obtained by granulating and forming the carbide C are dried by the dryer 5. The generator 7, the power storage device 8, and the power supply system 9 perform power generation, power storage, power supply, and the like. Thereby, the energy consumer b can use the electric power.
[0017]
The carbide C is pulverized in the pulverizing and granulating step 6 and formed together with the collected material of the bag filter 3. As an example, when pelletizing a molded product, pellets made from carbide C that has adsorbed dioxin D and heavy metal are granulated, and pure coal powder purchased or manufactured outside the system is further granulated to form a double-structured pellet. To manufacture. These pellets are used as fuel for the gasification and melting furnace 1 instead of coke. The purpose of manufacturing the double-structured pellet is to prevent dioxin D and the like from diffusing from the inside of the pellet even if it is affected by heat while descending in the gasification and melting furnace 1. If the pellets are made of only carbide C, the harmful substances are diffused under the influence of heat. The double-structured pellets glow red and burn in the combustion zone of gasification and melting. Since the temperature near the combustion zone is around 1800 ° C., dioxin D is instantaneously decomposed (dioxin D is usually decomposed at 1300 ° C. or higher). Heavy metals have been proven to partition between slag and metal and not to be melted.
[0018]
The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.
[0019]
【The invention's effect】
According to the present invention, since the system is constituted by the above-described system, the following effects can be obtained.
[0020]
By connecting the conventional gasification melting furnace and carbonization furnace, there is an effect that high calorie gas can be recovered and power generation efficiency can be improved.
[0021]
Also, by producing fuel such as double-structured pellets from carbides, it becomes a substitute fuel for coke and becomes a self-contained processing equipment that does not require purchased fuel. Further, there is an effect that the harmful substances in the general waste can be detoxified, and the exhaust gas treatment cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a schematic configuration of a high calorie gas recovery device.
FIG. 2 is an explanatory diagram illustrating the operation of the high-calorie gas recovery device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gasification melting furnace 2 Carbonization furnace 3 Bag filter 4 Gas fuel internal combustion engine 5 Dryer 6 Crushing and granulating machine 7 Generator 8 Power storage device 9 Power supply system

Claims (3)

In high calorie gas recovery equipment that generates high calorie gas by processing combustibles such as local unused resources or waste, and recovers this high calorie gas,
A carbonization furnace that carbonizes the combustible material to generate a carbide, and a gasification and melting furnace that generates a gas,
The gasification / melting furnace and the carbonization furnace are connected to each other, and the generated gas generated in the gasification / melting furnace is guided to the carbonization furnace. At this time, a predetermined combustible substance in the carbonization furnace is generated by the gas sensible heat of the generated gas. A high-calorie gas recovery apparatus, wherein carbonized gas is recovered, and gas generated in the gasification melting furnace and the carbonization furnace is recovered. The said carbonization furnace carbonizes the wood etc. in this carbonization furnace, produces | generates a carbide | carbonized_material, and collects | eliminates the unnecessary substance in the produced | generated gas guide | induced from the said gasification-melting furnace by the carbide | carbonized_material. High calorie gas recovery equipment. The carbide recovered from the carbonization furnace is pulverized, and the pulverized carbide is formed into a special double-structured pellet or pricket, etc., and power is generated by the generated gas, and waste heat of the combustion gas used for the power generation is generated. The high-calorie gas recovery apparatus according to claim 1 or 2, wherein the pellets or preplets are dried and solidified to obtain heat of a gasification and melting furnace.

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